As someone who grew up in India, it’s been amazing to see how far the country has come since the internet first became GA in 1995. It was still way too expensive to use at that time (for me it would have cost a year’s pay to get a month’s access at 14,400bps)
More recently I’ve been working with RUM data and have done some research on the bandwidth available to real users. I’ve also presented this briefly at various conferences. Some results are available here: https://flic.kr/p/Va8zbH
I’m guessing you’re also familiar with Tim Kadlec’s work at https://whatdoesmysitecost.com/ which does a good job of showing how much a site costs as a function of GDP.